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Coolant Temperature Sensor (CTS)

Turn ignition off. Disconnect sensor connector. Measure resistance between sensor terminals. Replace sensor if resistance is not to specification. See COOLANT TEMPERATURE SENSOR (CTS) RESISTANCE  table.

COOLANT TEMPERATURE SENSOR (CTS) RESISTANCE (1)

Temperature - °F (°C) Ohms
Motronic System
-22 (-30) 20,000-30,000
68 (20) 8300-10,600
104 (40) 2300-2700
140 (60) 565-670
176 (80) 295-365
194 (90) 200-240
230 (110) 140-160
Trionic System
-22 (-30) 20,000-30,000
-14 (-10) 7000-11,400
68 (20) 2100-2900
104 (40) 1000-1300
140 (60) 565-670
176 (80) 295-365
194 (90) 240-260
230 (110) 140-160
(1) Measure resistance between sensor terminals.